Ken, I replaced my old 811A's with new 572B's.
They run cooler. You can not put out any more power
since the power supply was designed for 811A's.
I asked Ten Tec and they said 572A's will work and
they warned me not to overload the power supply.
These 572A's operate much better. I do not have to
worry about overloading the tubes.
Best regards, Jim FitzSimons W7ANF
Ken & Rose Kreis wrote:
>
> Anyone replace the 811A's in their Centaur with 572B's.
>
> Svetlana claims that their 572B's can be used as a drop-in replacement for
> the 811A's to provide up-graded performance.
>
> I am curious as to what the up-graded peformance would be?
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